大采高工作面厚硬顶板控制技术

发布时间：2018-05-02 09:12

本文选题：大采高 + 厚硬顶板　；参考：《安徽理工大学》2015年硕士论文

【摘要】：本文针对大采高厚硬顶板赋存条件(大采高,厚、硬),综合运用理论分析,数值模拟和现场实测相结合的方法对大采高厚硬顶板控制及支架工作阻力进行了研究。研究结果表明：运用FLAC3D模拟软件,建立模型对大采高厚硬顶板工作面垂直应力,垂直位移及塑性区变化特征进行了模拟研究。通过地质条件的分析,对大采高厚硬顶板采取前期强制放顶的技术以弱化顶板结构,使得厚硬顶板岩层在采空区时更容易垮落,这样有效的缩短了顶板周期来压步距,降低了顶板来压强度,厚硬顶板得到控制。(放后面) 通过现场实测,对大采高厚硬顶板工作面在前期强制放顶的基础上,对其顶板来压特征,两巷顶底板位移情况进行分析。通过实测数据,对顶板适应性进行分析,得出工作面顶板控制措施。
[Abstract]:In this paper, the control of thick hard roof and the working resistance of support are studied based on the conditions of occurrence of thick hard roof (large mining height, thick, hard roof, combined with theoretical analysis, numerical simulation and field measurement). The results show that: By using FLAC3D software, a model was established to simulate the variation characteristics of vertical stress, vertical displacement and plastic zone in thick and hard roof working face with large mining height. Based on the analysis of geological conditions, the technology of forced roof release in the early stage is adopted to weaken the roof structure, which makes the thick hard roof slate fall more easily in the goaf, which effectively shortens the interval of roof periodic pressure. The pressure strength of the roof is reduced and the thick and hard roof is controlled. (behind) Based on the field measurement, the characteristics of roof pressure and the displacement of roof and floor in two roadways are analyzed on the basis of forced roof caving in the early stage of thick hard roof working face with large mining height. According to the measured data, the roof adaptability is analyzed and the roof control measures are obtained.
【学位授予单位】：安徽理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TD327.2

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